Speaker



FIG. 1 is a top perspective view of a speaker, according to one embodiment of this invention;

FIG. 2 is a bottom perspective view of the speaker, as shown in FIG. 1;

FIG. 3 is a side view of the speaker, as shown in FIG. 1; and,

FIG. 4 is a side view, rotated 90 degrees from the side view shown in FIG. 3, of the speaker, as shown in FIG. 1. 

The ornamental design for a speaker, as shown. 